Taylor Swift has released “The Life of a Showgirl: The Encore,” an extended version of her 12th studio album, featuring four new songs including the track “Patient Zero.” The collection, released on Friday, Sept. "Patient Zero," "Cleveland!," "Pink Clouding" and "Babylon" all dropped at midnight. Key points and original sources are listed below.

• Taylor Swift has released “The Life of a Showgirl: The Encore,” an extended version of her 12th studio album, featuring four new songs including the track “Patient Zero.” The collection, released on Friday, Sept. 25, also includes “Cleveland!,” “Pink Clouding”...S1

• "Patient Zero," "Cleveland!," "Pink Clouding" and "Babylon" all dropped at midnight.S2